#pragma once
#include <unistd.h>
#include <sys/syscall.h>


namespace CurrentThread
{
    extern __thread int t_cacheTid;
    void cacheTid();
    
    inline int tid(){
        if(__builtin_expect(t_cacheTid == 0,0)){
            cacheTid();
        }
        return t_cacheTid;
    }
}